As a bonus, the following is an example of a simple integration test that you can use as a guide, to keep writing tests for your new code. Thanks to annotations, writing this kind of test is relatively simple:

@RunWith(SpringRunner.class)
@SpringBootTest
public class DemoApplicationTests 
{
  @Test
  public void contextLoads() 
  {
  }
}

The preceding explanations should be enough to provide you with a brief overview so that you can understand what Spring Boot is and what its benefits are. Now, it's time to review other Spring projects that you'll love.